Bituminous emulsion



Patented Oct. 5, 1954 BITUMINQUS EMULSKON STATES PATENT @FFEQE No Drawing. Application October 4, 1950, Serial No. 188,483

(Cl. l06-277) 12 Claims. 1

This invention relates to a composition of matter. More particularly it relates to a modified water and bitumen emulsion.

Water and bitumen emulsions are widely used as coating and adhesive compositions. Thus, they are employed in the waterproofing of concrete, cinder block and similar surfaces and in the control of dust on dirt surface roads. Both oil in water and water in oil types are used. One of the primary applications arises in road building Where the mineral aggregate is given a bituminous coating prior to hard surfacing. One of the major difiiculties experienced in such operations has been the failure of the coating to completely cover the mineral aggregate when the mineral to rain.

stripping by water.

invention.

ferred group of additives may be represented by the formula wherein R1 is an aliphatic radical of from 12 to carbon atoms and R2 is a member of the class of R1 and hydrogen. Thus, within the concept are included monoand di-lauryl, myristyl, palmityl, stearyl, arachidyl, oleyl, linoleyl, linolenyl and the like and mixtures thereof. Particularly convenient and practical are the mixtures of amines derived from mixtures of fatty acids as obtained from natural sources such as tallow, and the oils of coconut, soybean, linseed, corn, peanut,

As generally employed the bitu- I-Iigher concenlo aggregate is wet. Another dimculty has been the Olive, Sunflower ed and the like. tendency of the applied bituminous coating to The Water and bitumen emulsions as pl y d wash off the mineral aggregate when it is exposed in this invention are Widely d and commercially available.

It is an object of the present invention to pro- 20 1111110115 phase has a p fi gravity f -14 at vide a water and bitumen emulsion composition 5 C., with a bitumen content of 82%, a float which effectively coats both damp and dry surtest at 50 (3., within the range of 50 to 125 secfaces of mineral aggregate used in road building onds and a distillation distribution as follows: as well as concrete, cinder block and the like. v Up to 1700 (1,00%

It is a further ob ect of the present 1nvent on to 2;) Up to C. not more than 120% provide a bitum nous coatmg surface for mineral Up to C. not more than 200% aggregate used In road building as well as con- Up to 3000 C" not more than 0% crete, cinder block and the like which resists The softening point of the residue from the dis- These and other objects will become apparent tillebion i generally withi t e ran e of 50 C., in the course of the following description of the t0 The before mentioned polyethenoxy aliphatic In accordance with the present invention it has amines y be added e t er to the finished emulb fgund t t Water d bit emulsions sion or to the bituminous phase before or during when modified with a minor amount of certain the p p t of the emulsion. It has been polyethenoxy aliphatic amines to be described fill-111d that the p e ce even a trace of the hereinafter may be used to coat surfaces of min- Said polyethelloXy 311111181310 lnes enhances the eral aggregates used in road building as well as s and adhesive q liti f h ph lt concrete, cinder block and the like, whether such Coating. How the presence of Ou is surface be wet or dry. Furthermore, the coated Considered a minimum to O a practical advansurface thus provided resists stripping by water. tases although e l 111.115 10Wer limit will y The polyethenoxy aliphatic amines useful in amon the various derivatives. th present in enti are formed by th ti trations may be used Without deleterious effects. of ethylene oxide with the aliphatic amines con- The t t procedure p oyed to ev 1uate the forming to the formula presented below, by procvarious additives was as follows: grams of a esses known to the art. The particularly valuable members are those which are formed by the reaction of 3 to 5 mole of ethylene oxide per mol of the said amines. The amines which may serve as starting materials for preparation of the pretypical mineral aggregate was covered with Water for 5 minutes. At the end of this period the water was poured off and the damp mineral aggregate was covered with 3 grams of the bitumenwater-fatty amine composition, mixing so as to completely coat the mineral aggregate. The excess emulsion was allowed to drain. The coated mineral aggregate was then submerged in water and the retention of coating on its surface was noted. The observations were classified according to the designations as indicated in Table I.

Table I V. poor.Emulsion failed to coat the mineral aggregate.

Poor.--More than half of coating stripped from the mineral. aggregate on immersion.

Fair.l;iess than half of coating stripped from the mineral aggregate on immersion.

Good.Slight oil on surface of water.

aggregate completely covered.

V. good.-No oil separation apparent. Mineral aggregate completely covered.

The following examples fare cited "to illustrate the invention. They are not intended to limit it in any way. The observations were made at the end of a 72 hour interval except as noted. The emulsion consisted of 35% water in asphalt. The stone employed was Rhyolite pebble a surface Mineral Indicates avinumber of 'ethenoxy groups per mol of amine.

1 Indicates observation made-after 1 hour submersion.

3 Indicates observationmade after 24 hours submersion.

.By tallow amine and 'soyalyl amine respectively --is meant the amine derivative which results from the replacement of "COOH by CH2NH2 in the vnatural mixtureofu-acids :as obtained from tallow and-soybean oils-respectively. By distilled is meant-thatthe acids from which the amines were derived were distilled prior to the amineformation. In such case tallow amine is rich in stearylamine, and soyalylamine is rich in olelyamine.

In the compounding .of the bitumen in water type emulsions satisfactory results are obtained byinc'lusion .of additives as follows:

Example Additive Gone.

3- ethenoxy stearl-yamine 0. 3 ethenoxy laurylamine 0. 5 4 ethenoxy stearylamine 0. 5

' "Indicates average number of ethenoxy groups per mol of amine -It is obvious that the mineral aggregate may be :coated before or after it is bedded for road construction. It may be applied by spraying, dipping or the like. The emulsion is valuable as -a surface for dirt surfaces prior to the placing of concrete or of other hard surfacing to provide a moisture resistant base. It may be applied to normally porous surfaces such as cinder block to accomplish water-proofing. It is also useful as a water-proofing, base cement for the setting of tile. Many other applications and modifications will be apparent to those skilled in the art without departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

1. A composition of matter comprising a water and bitumen emulsion containing the reaction product of a plurality of molecular proportions of ethylene oxide with one molecular proportion of an amine of the formula H RLBITR2 wherein R1 is an aliphatic hydrocarbon radical of from 12 to 20 carbon atoms and R2 is a member of the group consisting of R1 and hydrogen.

2. A composition of matter as defined in claim 1 wherein the emulsion is bitumen-in-water.

3. A composition of matter as defined in claim 1 wherein the emulsion is water-in-bitumen.

4. A composition of matter as definedin claim 1 wherein R2 is hydrogen.

5. A composition of matter as defined in claim 1 wherein R2 is an aliphatic hydrocarbon radical of from 12 to 20 carbon atoms.

6. A composition of matter comprising a water and bitumen emulsion .containing the reaction product of from 3 to 5 molecular proportions of ethylene oxide with one molecular proportion of an amine of the formula H Rr-AI-Rz wherein R1 is an aliphatic hydrocarbon of from 12 to 20 carbon atoms and R2 is a member of the group consisting of R1 and hydrogen.

7. A composition of matter as defined in claim 6 wherein the said amine is a stearyl amine.

8. A composition of matter as defined in claim 6 wherein the said amine contains the mixed aliphatic hydrocarbon radicals of tallow acids.

9. A composition of matter as defined in claim 6 wherein the said amine contains the mixedv aliphatic hydrocarbon radicals of soy bean acids. 10. A composition of matter as defined in claim 6 wherein the said amine is a lauryl amine.

11. A composition of inatter'as defined in claim 6 wherein the said amine is monolauryl amine.

'12. A composition of matter as defined in claim 6 wherein the said amine is an oleyl amine.

References Cited in the file of this patent UNITED STATES PATENTS "Number Name Date 1,970,578 Schoeller et a1 Aug. 21, 1934 2,375,653 Holmes May 8, 1945 2,436,599 Read et a1 :Feb. 24, 1948 FOREIGN PATENTS Number Country Date 229,361 Great Britain Feb. 19, 1925 

1. A COMPOSITION OF MATTER COMPRISING A WATER AND BITUMEN EMULSION CONTAINING THE REACTION PRODUCT OF A PLURALITY OF MOLECULAR PROPORTIONS OF ETHYLENE OXIDE WITH ONE MOLECULAR PROPORTION OF AN AMINE OF THE FORMULA 